./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/loops-crafted-1/mono-crafted_1.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 38b53e6a Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1bdce7f7-15de-48b8-9b97-7e38a080ddd3/bin/uautomizer-ZsLfNo2U6R/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1bdce7f7-15de-48b8-9b97-7e38a080ddd3/bin/uautomizer-ZsLfNo2U6R/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1bdce7f7-15de-48b8-9b97-7e38a080ddd3/bin/uautomizer-ZsLfNo2U6R/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1bdce7f7-15de-48b8-9b97-7e38a080ddd3/bin/uautomizer-ZsLfNo2U6R/config/AutomizerReach.xml -i ../../sv-benchmarks/c/loops-crafted-1/mono-crafted_1.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1bdce7f7-15de-48b8-9b97-7e38a080ddd3/bin/uautomizer-ZsLfNo2U6R/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1bdce7f7-15de-48b8-9b97-7e38a080ddd3/bin/uautomizer-ZsLfNo2U6R --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 00e8f12f1d0e3d2fc679744754ceeef2daa37b874cd8db07b5ab8c35684165c0 --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-38b53e6 [2022-11-25 16:42:45,807 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-25 16:42:45,810 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-25 16:42:45,834 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-25 16:42:45,834 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-25 16:42:45,836 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-25 16:42:45,838 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-25 16:42:45,840 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-25 16:42:45,842 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-25 16:42:45,844 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-25 16:42:45,845 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-25 16:42:45,847 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-25 16:42:45,848 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-25 16:42:45,849 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-25 16:42:45,851 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-25 16:42:45,853 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-25 16:42:45,854 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-25 16:42:45,856 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-25 16:42:45,858 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-25 16:42:45,860 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-25 16:42:45,862 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-25 16:42:45,864 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-25 16:42:45,866 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-25 16:42:45,867 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-25 16:42:45,872 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-25 16:42:45,872 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-25 16:42:45,873 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-25 16:42:45,874 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-25 16:42:45,875 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-25 16:42:45,877 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-25 16:42:45,877 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-25 16:42:45,879 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-25 16:42:45,880 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-25 16:42:45,882 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-25 16:42:45,884 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-25 16:42:45,884 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-25 16:42:45,886 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-25 16:42:45,886 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-25 16:42:45,887 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-25 16:42:45,888 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-25 16:42:45,889 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-25 16:42:45,892 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1bdce7f7-15de-48b8-9b97-7e38a080ddd3/bin/uautomizer-ZsLfNo2U6R/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-11-25 16:42:45,940 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-25 16:42:45,941 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-25 16:42:45,942 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-25 16:42:45,943 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-25 16:42:45,944 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-25 16:42:45,945 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-25 16:42:45,946 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-25 16:42:45,946 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-25 16:42:45,947 INFO L138 SettingsManager]: * Use SBE=true [2022-11-25 16:42:45,947 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-25 16:42:45,949 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-25 16:42:45,949 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-25 16:42:45,950 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-25 16:42:45,950 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-25 16:42:45,950 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-25 16:42:45,951 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-25 16:42:45,951 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-25 16:42:45,952 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-25 16:42:45,952 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-25 16:42:45,952 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-25 16:42:45,953 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-25 16:42:45,953 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-25 16:42:45,954 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-25 16:42:45,954 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-25 16:42:45,954 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-25 16:42:45,955 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-25 16:42:45,955 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-25 16:42:45,956 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-25 16:42:45,957 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-11-25 16:42:45,957 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-25 16:42:45,958 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-11-25 16:42:45,958 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-25 16:42:45,959 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2022-11-25 16:42:45,959 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-11-25 16:42:45,959 INFO L138 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1bdce7f7-15de-48b8-9b97-7e38a080ddd3/bin/uautomizer-ZsLfNo2U6R/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1bdce7f7-15de-48b8-9b97-7e38a080ddd3/bin/uautomizer-ZsLfNo2U6R Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 00e8f12f1d0e3d2fc679744754ceeef2daa37b874cd8db07b5ab8c35684165c0 [2022-11-25 16:42:46,294 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-25 16:42:46,338 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-25 16:42:46,341 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-25 16:42:46,343 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-25 16:42:46,343 INFO L275 PluginConnector]: CDTParser initialized [2022-11-25 16:42:46,345 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1bdce7f7-15de-48b8-9b97-7e38a080ddd3/bin/uautomizer-ZsLfNo2U6R/../../sv-benchmarks/c/loops-crafted-1/mono-crafted_1.c [2022-11-25 16:42:50,056 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-11-25 16:42:50,269 INFO L351 CDTParser]: Found 1 translation units. [2022-11-25 16:42:50,270 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1bdce7f7-15de-48b8-9b97-7e38a080ddd3/sv-benchmarks/c/loops-crafted-1/mono-crafted_1.c [2022-11-25 16:42:50,278 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1bdce7f7-15de-48b8-9b97-7e38a080ddd3/bin/uautomizer-ZsLfNo2U6R/data/8bc7f37c6/aaf2ffdf173d45f697e1fe0ea292c339/FLAG858c8f7d8 [2022-11-25 16:42:50,301 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1bdce7f7-15de-48b8-9b97-7e38a080ddd3/bin/uautomizer-ZsLfNo2U6R/data/8bc7f37c6/aaf2ffdf173d45f697e1fe0ea292c339 [2022-11-25 16:42:50,308 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-25 16:42:50,311 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-25 16:42:50,319 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-25 16:42:50,319 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-25 16:42:50,325 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-25 16:42:50,326 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 04:42:50" (1/1) ... [2022-11-25 16:42:50,327 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7b6bbc04 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 04:42:50, skipping insertion in model container [2022-11-25 16:42:50,328 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 04:42:50" (1/1) ... [2022-11-25 16:42:50,338 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-25 16:42:50,354 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-25 16:42:50,541 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1bdce7f7-15de-48b8-9b97-7e38a080ddd3/sv-benchmarks/c/loops-crafted-1/mono-crafted_1.c[318,331] [2022-11-25 16:42:50,569 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-25 16:42:50,581 INFO L203 MainTranslator]: Completed pre-run [2022-11-25 16:42:50,593 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1bdce7f7-15de-48b8-9b97-7e38a080ddd3/sv-benchmarks/c/loops-crafted-1/mono-crafted_1.c[318,331] [2022-11-25 16:42:50,597 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-25 16:42:50,614 INFO L208 MainTranslator]: Completed translation [2022-11-25 16:42:50,614 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 04:42:50 WrapperNode [2022-11-25 16:42:50,614 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-25 16:42:50,616 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-25 16:42:50,616 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-25 16:42:50,616 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-25 16:42:50,624 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 04:42:50" (1/1) ... [2022-11-25 16:42:50,631 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 04:42:50" (1/1) ... [2022-11-25 16:42:50,656 INFO L138 Inliner]: procedures = 12, calls = 8, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 46 [2022-11-25 16:42:50,656 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-25 16:42:50,657 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-25 16:42:50,657 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-25 16:42:50,658 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-25 16:42:50,670 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 04:42:50" (1/1) ... [2022-11-25 16:42:50,671 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 04:42:50" (1/1) ... [2022-11-25 16:42:50,673 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 04:42:50" (1/1) ... [2022-11-25 16:42:50,674 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 04:42:50" (1/1) ... [2022-11-25 16:42:50,677 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 04:42:50" (1/1) ... [2022-11-25 16:42:50,683 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 04:42:50" (1/1) ... [2022-11-25 16:42:50,684 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 04:42:50" (1/1) ... [2022-11-25 16:42:50,685 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 04:42:50" (1/1) ... [2022-11-25 16:42:50,687 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-25 16:42:50,688 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-25 16:42:50,688 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-25 16:42:50,688 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-25 16:42:50,689 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 04:42:50" (1/1) ... [2022-11-25 16:42:50,697 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-25 16:42:50,713 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1bdce7f7-15de-48b8-9b97-7e38a080ddd3/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 16:42:50,728 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1bdce7f7-15de-48b8-9b97-7e38a080ddd3/bin/uautomizer-ZsLfNo2U6R/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-25 16:42:50,731 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1bdce7f7-15de-48b8-9b97-7e38a080ddd3/bin/uautomizer-ZsLfNo2U6R/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-25 16:42:50,784 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-25 16:42:50,785 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-25 16:42:50,785 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-25 16:42:50,785 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-25 16:42:50,872 INFO L235 CfgBuilder]: Building ICFG [2022-11-25 16:42:50,875 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-25 16:42:51,017 INFO L276 CfgBuilder]: Performing block encoding [2022-11-25 16:42:51,025 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-25 16:42:51,026 INFO L300 CfgBuilder]: Removed 2 assume(true) statements. [2022-11-25 16:42:51,028 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 04:42:51 BoogieIcfgContainer [2022-11-25 16:42:51,028 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-25 16:42:51,032 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-25 16:42:51,032 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-25 16:42:51,037 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-25 16:42:51,037 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 25.11 04:42:50" (1/3) ... [2022-11-25 16:42:51,038 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1ea63685 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 04:42:51, skipping insertion in model container [2022-11-25 16:42:51,039 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 04:42:50" (2/3) ... [2022-11-25 16:42:51,039 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1ea63685 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 04:42:51, skipping insertion in model container [2022-11-25 16:42:51,040 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 04:42:51" (3/3) ... [2022-11-25 16:42:51,041 INFO L112 eAbstractionObserver]: Analyzing ICFG mono-crafted_1.c [2022-11-25 16:42:51,067 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-25 16:42:51,068 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-25 16:42:51,132 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-25 16:42:51,142 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@3463a755, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-25 16:42:51,143 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-25 16:42:51,149 INFO L276 IsEmpty]: Start isEmpty. Operand has 13 states, 11 states have (on average 1.6363636363636365) internal successors, (18), 12 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 16:42:51,162 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2022-11-25 16:42:51,162 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 16:42:51,163 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-11-25 16:42:51,164 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 16:42:51,173 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 16:42:51,174 INFO L85 PathProgramCache]: Analyzing trace with hash 1818421976, now seen corresponding path program 1 times [2022-11-25 16:42:51,187 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 16:42:51,187 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1488890978] [2022-11-25 16:42:51,188 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 16:42:51,189 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 16:42:51,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 16:42:51,438 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 16:42:51,439 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 16:42:51,439 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1488890978] [2022-11-25 16:42:51,441 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1488890978] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 16:42:51,442 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 16:42:51,442 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-25 16:42:51,444 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [399094052] [2022-11-25 16:42:51,446 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 16:42:51,451 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-11-25 16:42:51,453 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 16:42:51,526 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-11-25 16:42:51,527 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-25 16:42:51,530 INFO L87 Difference]: Start difference. First operand has 13 states, 11 states have (on average 1.6363636363636365) internal successors, (18), 12 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 2 states, 2 states have (on average 3.5) internal successors, (7), 2 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 16:42:51,555 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 16:42:51,556 INFO L93 Difference]: Finished difference Result 22 states and 29 transitions. [2022-11-25 16:42:51,557 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-11-25 16:42:51,559 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 3.5) internal successors, (7), 2 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2022-11-25 16:42:51,560 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 16:42:51,567 INFO L225 Difference]: With dead ends: 22 [2022-11-25 16:42:51,567 INFO L226 Difference]: Without dead ends: 9 [2022-11-25 16:42:51,570 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-25 16:42:51,575 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 15 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-25 16:42:51,576 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 15 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-25 16:42:51,598 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9 states. [2022-11-25 16:42:51,612 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9 to 9. [2022-11-25 16:42:51,614 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9 states, 8 states have (on average 1.375) internal successors, (11), 8 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 16:42:51,614 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 11 transitions. [2022-11-25 16:42:51,616 INFO L78 Accepts]: Start accepts. Automaton has 9 states and 11 transitions. Word has length 7 [2022-11-25 16:42:51,617 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 16:42:51,617 INFO L495 AbstractCegarLoop]: Abstraction has 9 states and 11 transitions. [2022-11-25 16:42:51,617 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 3.5) internal successors, (7), 2 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 16:42:51,618 INFO L276 IsEmpty]: Start isEmpty. Operand 9 states and 11 transitions. [2022-11-25 16:42:51,618 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2022-11-25 16:42:51,618 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 16:42:51,619 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-11-25 16:42:51,619 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-25 16:42:51,620 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 16:42:51,620 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 16:42:51,620 INFO L85 PathProgramCache]: Analyzing trace with hash 1809186766, now seen corresponding path program 1 times [2022-11-25 16:42:51,621 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 16:42:51,621 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [702203529] [2022-11-25 16:42:51,621 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 16:42:51,622 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 16:42:51,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 16:42:51,705 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 16:42:51,705 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 16:42:51,706 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [702203529] [2022-11-25 16:42:51,706 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [702203529] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 16:42:51,706 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 16:42:51,706 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-25 16:42:51,707 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [53963476] [2022-11-25 16:42:51,707 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 16:42:51,709 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-25 16:42:51,709 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 16:42:51,710 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-25 16:42:51,710 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-25 16:42:51,711 INFO L87 Difference]: Start difference. First operand 9 states and 11 transitions. Second operand has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 16:42:51,736 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 16:42:51,736 INFO L93 Difference]: Finished difference Result 18 states and 24 transitions. [2022-11-25 16:42:51,737 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-25 16:42:51,737 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2022-11-25 16:42:51,737 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 16:42:51,738 INFO L225 Difference]: With dead ends: 18 [2022-11-25 16:42:51,738 INFO L226 Difference]: Without dead ends: 11 [2022-11-25 16:42:51,738 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-25 16:42:51,740 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 1 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 13 SdHoareTripleChecker+Invalid, 9 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 8 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-25 16:42:51,741 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 13 Invalid, 9 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 8 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-25 16:42:51,742 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11 states. [2022-11-25 16:42:51,745 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11 to 11. [2022-11-25 16:42:51,745 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11 states, 10 states have (on average 1.3) internal successors, (13), 10 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 16:42:51,746 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 13 transitions. [2022-11-25 16:42:51,746 INFO L78 Accepts]: Start accepts. Automaton has 11 states and 13 transitions. Word has length 7 [2022-11-25 16:42:51,746 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 16:42:51,747 INFO L495 AbstractCegarLoop]: Abstraction has 11 states and 13 transitions. [2022-11-25 16:42:51,747 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 16:42:51,747 INFO L276 IsEmpty]: Start isEmpty. Operand 11 states and 13 transitions. [2022-11-25 16:42:51,748 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2022-11-25 16:42:51,748 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 16:42:51,748 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 16:42:51,748 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-25 16:42:51,749 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 16:42:51,749 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 16:42:51,750 INFO L85 PathProgramCache]: Analyzing trace with hash 576672011, now seen corresponding path program 1 times [2022-11-25 16:42:51,750 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 16:42:51,750 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [381800215] [2022-11-25 16:42:51,751 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 16:42:51,751 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 16:42:51,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 16:42:51,839 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-25 16:42:51,840 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 16:42:51,840 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [381800215] [2022-11-25 16:42:51,840 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [381800215] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 16:42:51,841 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 16:42:51,841 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-25 16:42:51,841 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1376999650] [2022-11-25 16:42:51,841 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 16:42:51,842 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-25 16:42:51,842 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 16:42:51,843 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-25 16:42:51,843 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-25 16:42:51,844 INFO L87 Difference]: Start difference. First operand 11 states and 13 transitions. Second operand has 3 states, 3 states have (on average 3.0) internal successors, (9), 3 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 16:42:51,859 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 16:42:51,860 INFO L93 Difference]: Finished difference Result 16 states and 18 transitions. [2022-11-25 16:42:51,860 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-25 16:42:51,861 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.0) internal successors, (9), 3 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2022-11-25 16:42:51,861 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 16:42:51,861 INFO L225 Difference]: With dead ends: 16 [2022-11-25 16:42:51,862 INFO L226 Difference]: Without dead ends: 12 [2022-11-25 16:42:51,862 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-25 16:42:51,864 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 0 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 5 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 12 SdHoareTripleChecker+Invalid, 6 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 5 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-25 16:42:51,865 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 12 Invalid, 6 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 5 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-25 16:42:51,866 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12 states. [2022-11-25 16:42:51,870 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12 to 12. [2022-11-25 16:42:51,870 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12 states, 11 states have (on average 1.2727272727272727) internal successors, (14), 11 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 16:42:51,871 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 14 transitions. [2022-11-25 16:42:51,871 INFO L78 Accepts]: Start accepts. Automaton has 12 states and 14 transitions. Word has length 9 [2022-11-25 16:42:51,871 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 16:42:51,872 INFO L495 AbstractCegarLoop]: Abstraction has 12 states and 14 transitions. [2022-11-25 16:42:51,872 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.0) internal successors, (9), 3 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 16:42:51,872 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states and 14 transitions. [2022-11-25 16:42:51,873 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-11-25 16:42:51,873 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 16:42:51,873 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 16:42:51,873 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-11-25 16:42:51,874 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 16:42:51,874 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 16:42:51,875 INFO L85 PathProgramCache]: Analyzing trace with hash 698628545, now seen corresponding path program 1 times [2022-11-25 16:42:51,875 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 16:42:51,875 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2027159171] [2022-11-25 16:42:51,876 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 16:42:51,876 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 16:42:51,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 16:42:51,954 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-25 16:42:51,954 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 16:42:51,954 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2027159171] [2022-11-25 16:42:51,955 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2027159171] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 16:42:51,955 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2050351019] [2022-11-25 16:42:51,955 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 16:42:51,956 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 16:42:51,956 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1bdce7f7-15de-48b8-9b97-7e38a080ddd3/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 16:42:51,960 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1bdce7f7-15de-48b8-9b97-7e38a080ddd3/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 16:42:52,013 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1bdce7f7-15de-48b8-9b97-7e38a080ddd3/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-25 16:42:52,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 16:42:52,067 INFO L263 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-25 16:42:52,073 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 16:42:52,131 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-25 16:42:52,132 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 16:42:52,201 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-25 16:42:52,202 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2050351019] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 16:42:52,202 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 16:42:52,203 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 7 [2022-11-25 16:42:52,203 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [536157611] [2022-11-25 16:42:52,204 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 16:42:52,204 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-25 16:42:52,205 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 16:42:52,205 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-25 16:42:52,206 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2022-11-25 16:42:52,206 INFO L87 Difference]: Start difference. First operand 12 states and 14 transitions. Second operand has 7 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 7 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 16:42:52,286 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 16:42:52,288 INFO L93 Difference]: Finished difference Result 25 states and 34 transitions. [2022-11-25 16:42:52,289 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-25 16:42:52,289 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 7 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2022-11-25 16:42:52,289 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 16:42:52,291 INFO L225 Difference]: With dead ends: 25 [2022-11-25 16:42:52,292 INFO L226 Difference]: Without dead ends: 17 [2022-11-25 16:42:52,293 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2022-11-25 16:42:52,295 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 2 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 16 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 16 SdHoareTripleChecker+Invalid, 22 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 16 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-25 16:42:52,302 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 16 Invalid, 22 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 16 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-25 16:42:52,303 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2022-11-25 16:42:52,308 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2022-11-25 16:42:52,313 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17 states, 16 states have (on average 1.25) internal successors, (20), 16 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 16:42:52,314 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 20 transitions. [2022-11-25 16:42:52,315 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 20 transitions. Word has length 10 [2022-11-25 16:42:52,315 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 16:42:52,315 INFO L495 AbstractCegarLoop]: Abstraction has 17 states and 20 transitions. [2022-11-25 16:42:52,316 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 7 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 16:42:52,316 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 20 transitions. [2022-11-25 16:42:52,317 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-11-25 16:42:52,317 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 16:42:52,317 INFO L195 NwaCegarLoop]: trace histogram [4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 16:42:52,330 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1bdce7f7-15de-48b8-9b97-7e38a080ddd3/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-25 16:42:52,524 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1bdce7f7-15de-48b8-9b97-7e38a080ddd3/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 16:42:52,524 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 16:42:52,525 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 16:42:52,525 INFO L85 PathProgramCache]: Analyzing trace with hash -693598994, now seen corresponding path program 1 times [2022-11-25 16:42:52,525 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 16:42:52,525 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [949964437] [2022-11-25 16:42:52,526 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 16:42:52,526 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 16:42:52,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 16:42:52,768 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 9 proven. 6 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-25 16:42:52,780 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 16:42:52,780 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [949964437] [2022-11-25 16:42:52,781 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [949964437] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 16:42:52,781 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [258713578] [2022-11-25 16:42:52,781 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 16:42:52,782 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 16:42:52,782 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1bdce7f7-15de-48b8-9b97-7e38a080ddd3/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 16:42:52,796 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1bdce7f7-15de-48b8-9b97-7e38a080ddd3/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 16:42:52,808 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1bdce7f7-15de-48b8-9b97-7e38a080ddd3/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-25 16:42:52,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 16:42:52,896 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-25 16:42:52,903 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 16:42:52,952 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 9 proven. 6 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-25 16:42:52,955 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 16:42:53,055 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 9 proven. 6 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-25 16:42:53,055 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [258713578] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 16:42:53,056 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 16:42:53,056 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 9 [2022-11-25 16:42:53,056 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1733683077] [2022-11-25 16:42:53,057 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 16:42:53,057 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-11-25 16:42:53,063 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 16:42:53,064 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-11-25 16:42:53,065 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2022-11-25 16:42:53,065 INFO L87 Difference]: Start difference. First operand 17 states and 20 transitions. Second operand has 9 states, 9 states have (on average 2.888888888888889) internal successors, (26), 9 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 16:42:53,133 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 16:42:53,135 INFO L93 Difference]: Finished difference Result 36 states and 46 transitions. [2022-11-25 16:42:53,136 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-25 16:42:53,137 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.888888888888889) internal successors, (26), 9 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2022-11-25 16:42:53,137 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 16:42:53,139 INFO L225 Difference]: With dead ends: 36 [2022-11-25 16:42:53,140 INFO L226 Difference]: Without dead ends: 25 [2022-11-25 16:42:53,141 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2022-11-25 16:42:53,143 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 0 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 28 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 21 SdHoareTripleChecker+Invalid, 29 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 28 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-25 16:42:53,146 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 21 Invalid, 29 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 28 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-25 16:42:53,147 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2022-11-25 16:42:53,152 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2022-11-25 16:42:53,156 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 24 states have (on average 1.1666666666666667) internal successors, (28), 24 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 16:42:53,157 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 28 transitions. [2022-11-25 16:42:53,159 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 28 transitions. Word has length 16 [2022-11-25 16:42:53,160 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 16:42:53,160 INFO L495 AbstractCegarLoop]: Abstraction has 25 states and 28 transitions. [2022-11-25 16:42:53,161 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.888888888888889) internal successors, (26), 9 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 16:42:53,162 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 28 transitions. [2022-11-25 16:42:53,162 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-11-25 16:42:53,163 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 16:42:53,163 INFO L195 NwaCegarLoop]: trace histogram [8, 6, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 16:42:53,179 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1bdce7f7-15de-48b8-9b97-7e38a080ddd3/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-25 16:42:53,370 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1bdce7f7-15de-48b8-9b97-7e38a080ddd3/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 16:42:53,371 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 16:42:53,371 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 16:42:53,371 INFO L85 PathProgramCache]: Analyzing trace with hash 219186682, now seen corresponding path program 2 times [2022-11-25 16:42:53,372 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 16:42:53,372 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1765944901] [2022-11-25 16:42:53,372 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 16:42:53,372 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 16:42:53,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 16:42:53,538 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 21 proven. 42 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-25 16:42:53,539 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 16:42:53,539 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1765944901] [2022-11-25 16:42:53,539 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1765944901] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 16:42:53,540 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1903496264] [2022-11-25 16:42:53,540 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-25 16:42:53,540 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 16:42:53,541 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1bdce7f7-15de-48b8-9b97-7e38a080ddd3/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 16:42:53,542 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1bdce7f7-15de-48b8-9b97-7e38a080ddd3/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 16:42:53,595 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1bdce7f7-15de-48b8-9b97-7e38a080ddd3/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-25 16:42:53,631 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-25 16:42:53,631 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 16:42:53,633 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-25 16:42:53,634 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 16:42:53,731 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 21 proven. 42 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-25 16:42:53,731 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 16:42:53,912 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 21 proven. 42 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-25 16:42:53,912 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1903496264] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 16:42:53,912 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 16:42:53,913 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 17 [2022-11-25 16:42:53,913 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [869054697] [2022-11-25 16:42:53,913 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 16:42:53,914 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-11-25 16:42:53,914 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 16:42:53,915 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-11-25 16:42:53,916 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2022-11-25 16:42:53,916 INFO L87 Difference]: Start difference. First operand 25 states and 28 transitions. Second operand has 17 states, 17 states have (on average 2.4705882352941178) internal successors, (42), 17 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 16:42:53,993 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 16:42:53,993 INFO L93 Difference]: Finished difference Result 52 states and 66 transitions. [2022-11-25 16:42:53,995 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-11-25 16:42:53,995 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.4705882352941178) internal successors, (42), 17 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-11-25 16:42:53,996 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 16:42:53,997 INFO L225 Difference]: With dead ends: 52 [2022-11-25 16:42:53,997 INFO L226 Difference]: Without dead ends: 41 [2022-11-25 16:42:53,998 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2022-11-25 16:42:53,999 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 0 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 46 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 25 SdHoareTripleChecker+Invalid, 47 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 46 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-25 16:42:53,999 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 25 Invalid, 47 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 46 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-25 16:42:54,000 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2022-11-25 16:42:54,007 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 41. [2022-11-25 16:42:54,008 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 40 states have (on average 1.1) internal successors, (44), 40 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 16:42:54,009 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 44 transitions. [2022-11-25 16:42:54,009 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 44 transitions. Word has length 24 [2022-11-25 16:42:54,010 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 16:42:54,010 INFO L495 AbstractCegarLoop]: Abstraction has 41 states and 44 transitions. [2022-11-25 16:42:54,010 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 2.4705882352941178) internal successors, (42), 17 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 16:42:54,011 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 44 transitions. [2022-11-25 16:42:54,012 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2022-11-25 16:42:54,012 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 16:42:54,012 INFO L195 NwaCegarLoop]: trace histogram [16, 14, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 16:42:54,023 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1bdce7f7-15de-48b8-9b97-7e38a080ddd3/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-11-25 16:42:54,224 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1bdce7f7-15de-48b8-9b97-7e38a080ddd3/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2022-11-25 16:42:54,224 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 16:42:54,226 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 16:42:54,227 INFO L85 PathProgramCache]: Analyzing trace with hash 1801004050, now seen corresponding path program 3 times [2022-11-25 16:42:54,227 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 16:42:54,228 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1978645053] [2022-11-25 16:42:54,229 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 16:42:54,230 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 16:42:54,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 16:42:54,790 INFO L134 CoverageAnalysis]: Checked inductivity of 257 backedges. 45 proven. 210 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-25 16:42:54,791 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 16:42:54,791 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1978645053] [2022-11-25 16:42:54,791 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1978645053] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 16:42:54,791 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [202395520] [2022-11-25 16:42:54,792 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-25 16:42:54,792 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 16:42:54,792 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1bdce7f7-15de-48b8-9b97-7e38a080ddd3/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 16:42:54,794 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1bdce7f7-15de-48b8-9b97-7e38a080ddd3/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 16:42:54,855 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1bdce7f7-15de-48b8-9b97-7e38a080ddd3/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-25 16:42:54,953 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-11-25 16:42:54,953 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 16:42:54,954 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-25 16:42:54,957 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 16:42:55,246 INFO L134 CoverageAnalysis]: Checked inductivity of 257 backedges. 46 proven. 1 refuted. 0 times theorem prover too weak. 210 trivial. 0 not checked. [2022-11-25 16:42:55,247 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 16:42:55,469 INFO L134 CoverageAnalysis]: Checked inductivity of 257 backedges. 46 proven. 1 refuted. 0 times theorem prover too weak. 210 trivial. 0 not checked. [2022-11-25 16:42:55,469 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [202395520] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 16:42:55,469 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 16:42:55,470 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 5, 5] total 23 [2022-11-25 16:42:55,470 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [199237003] [2022-11-25 16:42:55,470 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 16:42:55,473 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-11-25 16:42:55,473 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 16:42:55,475 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-11-25 16:42:55,476 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=163, Invalid=343, Unknown=0, NotChecked=0, Total=506 [2022-11-25 16:42:55,479 INFO L87 Difference]: Start difference. First operand 41 states and 44 transitions. Second operand has 23 states, 23 states have (on average 2.5217391304347827) internal successors, (58), 23 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 16:42:55,905 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 16:42:55,906 INFO L93 Difference]: Finished difference Result 64 states and 78 transitions. [2022-11-25 16:42:55,907 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-11-25 16:42:55,907 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.5217391304347827) internal successors, (58), 23 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2022-11-25 16:42:55,908 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 16:42:55,909 INFO L225 Difference]: With dead ends: 64 [2022-11-25 16:42:55,912 INFO L226 Difference]: Without dead ends: 53 [2022-11-25 16:42:55,914 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 74 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 218 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=478, Invalid=928, Unknown=0, NotChecked=0, Total=1406 [2022-11-25 16:42:55,915 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 7 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 62 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 21 SdHoareTripleChecker+Invalid, 66 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 62 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-25 16:42:55,919 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 21 Invalid, 66 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 62 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-25 16:42:55,922 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2022-11-25 16:42:55,929 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 47. [2022-11-25 16:42:55,932 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47 states, 46 states have (on average 1.0869565217391304) internal successors, (50), 46 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 16:42:55,935 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 50 transitions. [2022-11-25 16:42:55,939 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 50 transitions. Word has length 40 [2022-11-25 16:42:55,940 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 16:42:55,940 INFO L495 AbstractCegarLoop]: Abstraction has 47 states and 50 transitions. [2022-11-25 16:42:55,940 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.5217391304347827) internal successors, (58), 23 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 16:42:55,941 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 50 transitions. [2022-11-25 16:42:55,942 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2022-11-25 16:42:55,942 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 16:42:55,943 INFO L195 NwaCegarLoop]: trace histogram [17, 15, 5, 2, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 16:42:55,955 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1bdce7f7-15de-48b8-9b97-7e38a080ddd3/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-11-25 16:42:56,149 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1bdce7f7-15de-48b8-9b97-7e38a080ddd3/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 16:42:56,149 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 16:42:56,150 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 16:42:56,150 INFO L85 PathProgramCache]: Analyzing trace with hash 842950389, now seen corresponding path program 4 times [2022-11-25 16:42:56,150 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 16:42:56,150 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2017952087] [2022-11-25 16:42:56,150 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 16:42:56,150 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 16:42:56,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 16:42:56,669 INFO L134 CoverageAnalysis]: Checked inductivity of 304 backedges. 48 proven. 240 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-11-25 16:42:56,669 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 16:42:56,669 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2017952087] [2022-11-25 16:42:56,669 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2017952087] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 16:42:56,669 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [795287721] [2022-11-25 16:42:56,670 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-25 16:42:56,670 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 16:42:56,670 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1bdce7f7-15de-48b8-9b97-7e38a080ddd3/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 16:42:56,676 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1bdce7f7-15de-48b8-9b97-7e38a080ddd3/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 16:42:56,699 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1bdce7f7-15de-48b8-9b97-7e38a080ddd3/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-25 16:42:56,766 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-25 16:42:56,766 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 16:42:56,768 INFO L263 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 17 conjunts are in the unsatisfiable core [2022-11-25 16:42:56,773 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 16:42:56,884 INFO L134 CoverageAnalysis]: Checked inductivity of 304 backedges. 48 proven. 240 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-11-25 16:42:56,885 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 16:42:57,509 INFO L134 CoverageAnalysis]: Checked inductivity of 304 backedges. 48 proven. 240 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-11-25 16:42:57,509 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [795287721] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 16:42:57,509 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 16:42:57,509 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18, 18] total 35 [2022-11-25 16:42:57,509 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1361962833] [2022-11-25 16:42:57,510 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 16:42:57,510 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-11-25 16:42:57,510 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 16:42:57,512 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-11-25 16:42:57,512 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=595, Invalid=595, Unknown=0, NotChecked=0, Total=1190 [2022-11-25 16:42:57,513 INFO L87 Difference]: Start difference. First operand 47 states and 50 transitions. Second operand has 35 states, 35 states have (on average 2.2285714285714286) internal successors, (78), 35 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 16:42:57,739 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 16:42:57,739 INFO L93 Difference]: Finished difference Result 96 states and 119 transitions. [2022-11-25 16:42:57,740 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2022-11-25 16:42:57,740 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 2.2285714285714286) internal successors, (78), 35 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 46 [2022-11-25 16:42:57,743 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 16:42:57,747 INFO L225 Difference]: With dead ends: 96 [2022-11-25 16:42:57,747 INFO L226 Difference]: Without dead ends: 81 [2022-11-25 16:42:57,748 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 75 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=595, Invalid=595, Unknown=0, NotChecked=0, Total=1190 [2022-11-25 16:42:57,750 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 0 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 88 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 29 SdHoareTripleChecker+Invalid, 89 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 88 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-25 16:42:57,751 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 29 Invalid, 89 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 88 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-25 16:42:57,753 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2022-11-25 16:42:57,774 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 81. [2022-11-25 16:42:57,775 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 81 states, 80 states have (on average 1.05) internal successors, (84), 80 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 16:42:57,776 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 84 transitions. [2022-11-25 16:42:57,777 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 84 transitions. Word has length 46 [2022-11-25 16:42:57,779 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 16:42:57,779 INFO L495 AbstractCegarLoop]: Abstraction has 81 states and 84 transitions. [2022-11-25 16:42:57,779 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 2.2285714285714286) internal successors, (78), 35 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 16:42:57,780 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 84 transitions. [2022-11-25 16:42:57,785 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2022-11-25 16:42:57,785 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 16:42:57,785 INFO L195 NwaCegarLoop]: trace histogram [34, 32, 5, 2, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 16:42:57,797 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1bdce7f7-15de-48b8-9b97-7e38a080ddd3/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2022-11-25 16:42:57,991 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1bdce7f7-15de-48b8-9b97-7e38a080ddd3/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 16:42:57,992 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 16:42:57,992 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 16:42:57,992 INFO L85 PathProgramCache]: Analyzing trace with hash -1726294200, now seen corresponding path program 5 times [2022-11-25 16:42:57,992 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 16:42:57,992 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1039036786] [2022-11-25 16:42:57,992 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 16:42:57,993 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 16:42:58,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 16:42:59,382 INFO L134 CoverageAnalysis]: Checked inductivity of 1171 backedges. 99 proven. 1056 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-11-25 16:42:59,382 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 16:42:59,382 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1039036786] [2022-11-25 16:42:59,382 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1039036786] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 16:42:59,382 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [771167761] [2022-11-25 16:42:59,383 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-11-25 16:42:59,383 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 16:42:59,383 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1bdce7f7-15de-48b8-9b97-7e38a080ddd3/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 16:42:59,385 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1bdce7f7-15de-48b8-9b97-7e38a080ddd3/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 16:42:59,416 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1bdce7f7-15de-48b8-9b97-7e38a080ddd3/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-11-25 16:42:59,506 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 35 check-sat command(s) [2022-11-25 16:42:59,506 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 16:42:59,508 INFO L263 TraceCheckSpWp]: Trace formula consists of 205 conjuncts, 34 conjunts are in the unsatisfiable core [2022-11-25 16:42:59,512 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 16:42:59,720 INFO L134 CoverageAnalysis]: Checked inductivity of 1171 backedges. 99 proven. 1056 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-11-25 16:42:59,720 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 16:43:01,871 INFO L134 CoverageAnalysis]: Checked inductivity of 1171 backedges. 99 proven. 1056 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-11-25 16:43:01,872 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [771167761] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 16:43:01,872 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 16:43:01,872 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 35, 35] total 69 [2022-11-25 16:43:01,872 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [145543423] [2022-11-25 16:43:01,872 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 16:43:01,873 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 69 states [2022-11-25 16:43:01,873 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 16:43:01,876 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 69 interpolants. [2022-11-25 16:43:01,877 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2346, Invalid=2346, Unknown=0, NotChecked=0, Total=4692 [2022-11-25 16:43:01,878 INFO L87 Difference]: Start difference. First operand 81 states and 84 transitions. Second operand has 69 states, 69 states have (on average 2.1159420289855073) internal successors, (146), 69 states have internal predecessors, (146), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 16:43:02,228 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 16:43:02,228 INFO L93 Difference]: Finished difference Result 164 states and 204 transitions. [2022-11-25 16:43:02,229 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2022-11-25 16:43:02,229 INFO L78 Accepts]: Start accepts. Automaton has has 69 states, 69 states have (on average 2.1159420289855073) internal successors, (146), 69 states have internal predecessors, (146), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 80 [2022-11-25 16:43:02,230 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 16:43:02,232 INFO L225 Difference]: With dead ends: 164 [2022-11-25 16:43:02,232 INFO L226 Difference]: Without dead ends: 149 [2022-11-25 16:43:02,234 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 193 GetRequests, 126 SyntacticMatches, 0 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 128 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=2346, Invalid=2346, Unknown=0, NotChecked=0, Total=4692 [2022-11-25 16:43:02,238 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 0 mSDsluCounter, 36 mSDsCounter, 0 mSdLazyCounter, 172 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 45 SdHoareTripleChecker+Invalid, 173 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 172 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-25 16:43:02,243 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 45 Invalid, 173 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 172 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-25 16:43:02,245 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 149 states. [2022-11-25 16:43:02,289 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 149 to 149. [2022-11-25 16:43:02,290 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 149 states, 148 states have (on average 1.027027027027027) internal successors, (152), 148 states have internal predecessors, (152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 16:43:02,295 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149 states to 149 states and 152 transitions. [2022-11-25 16:43:02,295 INFO L78 Accepts]: Start accepts. Automaton has 149 states and 152 transitions. Word has length 80 [2022-11-25 16:43:02,297 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 16:43:02,297 INFO L495 AbstractCegarLoop]: Abstraction has 149 states and 152 transitions. [2022-11-25 16:43:02,298 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 69 states, 69 states have (on average 2.1159420289855073) internal successors, (146), 69 states have internal predecessors, (146), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 16:43:02,298 INFO L276 IsEmpty]: Start isEmpty. Operand 149 states and 152 transitions. [2022-11-25 16:43:02,302 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 149 [2022-11-25 16:43:02,306 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 16:43:02,306 INFO L195 NwaCegarLoop]: trace histogram [68, 66, 5, 2, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 16:43:02,321 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1bdce7f7-15de-48b8-9b97-7e38a080ddd3/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-11-25 16:43:02,513 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1bdce7f7-15de-48b8-9b97-7e38a080ddd3/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 16:43:02,513 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 16:43:02,514 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 16:43:02,514 INFO L85 PathProgramCache]: Analyzing trace with hash 439839150, now seen corresponding path program 6 times [2022-11-25 16:43:02,514 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 16:43:02,514 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2109762318] [2022-11-25 16:43:02,515 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 16:43:02,515 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 16:43:02,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 16:43:06,880 INFO L134 CoverageAnalysis]: Checked inductivity of 4639 backedges. 201 proven. 4422 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-11-25 16:43:06,881 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 16:43:06,881 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2109762318] [2022-11-25 16:43:06,881 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2109762318] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 16:43:06,881 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [959310528] [2022-11-25 16:43:06,881 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-11-25 16:43:06,881 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 16:43:06,882 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1bdce7f7-15de-48b8-9b97-7e38a080ddd3/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 16:43:06,883 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1bdce7f7-15de-48b8-9b97-7e38a080ddd3/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 16:43:06,919 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1bdce7f7-15de-48b8-9b97-7e38a080ddd3/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-11-25 16:43:06,972 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2022-11-25 16:43:06,973 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 16:43:06,974 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 10 conjunts are in the unsatisfiable core [2022-11-25 16:43:06,987 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 16:43:07,978 INFO L134 CoverageAnalysis]: Checked inductivity of 4639 backedges. 202 proven. 15 refuted. 0 times theorem prover too weak. 4422 trivial. 0 not checked. [2022-11-25 16:43:07,978 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 16:43:08,662 INFO L134 CoverageAnalysis]: Checked inductivity of 4639 backedges. 202 proven. 15 refuted. 0 times theorem prover too weak. 4422 trivial. 0 not checked. [2022-11-25 16:43:08,663 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [959310528] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 16:43:08,663 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 16:43:08,663 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [69, 8, 8] total 81 [2022-11-25 16:43:08,663 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [594760764] [2022-11-25 16:43:08,664 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 16:43:08,664 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 81 states [2022-11-25 16:43:08,665 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 16:43:08,666 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 81 interpolants. [2022-11-25 16:43:08,669 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2436, Invalid=4044, Unknown=0, NotChecked=0, Total=6480 [2022-11-25 16:43:08,670 INFO L87 Difference]: Start difference. First operand 149 states and 152 transitions. Second operand has 81 states, 81 states have (on average 2.0987654320987654) internal successors, (170), 81 states have internal predecessors, (170), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 16:43:12,672 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 16:43:12,672 INFO L93 Difference]: Finished difference Result 179 states and 196 transitions. [2022-11-25 16:43:12,673 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 81 states. [2022-11-25 16:43:12,673 INFO L78 Accepts]: Start accepts. Automaton has has 81 states, 81 states have (on average 2.0987654320987654) internal successors, (170), 81 states have internal predecessors, (170), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 148 [2022-11-25 16:43:12,674 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 16:43:12,674 INFO L225 Difference]: With dead ends: 179 [2022-11-25 16:43:12,674 INFO L226 Difference]: Without dead ends: 164 [2022-11-25 16:43:12,684 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 430 GetRequests, 284 SyntacticMatches, 0 SemanticMatches, 146 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3106 ImplicationChecksByTransitivity, 6.8s TimeCoverageRelationStatistics Valid=7729, Invalid=14027, Unknown=0, NotChecked=0, Total=21756 [2022-11-25 16:43:12,684 INFO L413 NwaCegarLoop]: 11 mSDtfsCounter, 3 mSDsluCounter, 31 mSDsCounter, 0 mSdLazyCounter, 215 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 42 SdHoareTripleChecker+Invalid, 216 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 215 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-25 16:43:12,685 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 42 Invalid, 216 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 215 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-25 16:43:12,686 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 164 states. [2022-11-25 16:43:12,721 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 164 to 158. [2022-11-25 16:43:12,722 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 158 states, 157 states have (on average 1.0254777070063694) internal successors, (161), 157 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 16:43:12,723 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 158 states to 158 states and 161 transitions. [2022-11-25 16:43:12,723 INFO L78 Accepts]: Start accepts. Automaton has 158 states and 161 transitions. Word has length 148 [2022-11-25 16:43:12,724 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 16:43:12,725 INFO L495 AbstractCegarLoop]: Abstraction has 158 states and 161 transitions. [2022-11-25 16:43:12,725 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 81 states, 81 states have (on average 2.0987654320987654) internal successors, (170), 81 states have internal predecessors, (170), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 16:43:12,725 INFO L276 IsEmpty]: Start isEmpty. Operand 158 states and 161 transitions. [2022-11-25 16:43:12,738 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 158 [2022-11-25 16:43:12,738 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 16:43:12,738 INFO L195 NwaCegarLoop]: trace histogram [69, 67, 12, 2, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 16:43:12,750 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1bdce7f7-15de-48b8-9b97-7e38a080ddd3/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-11-25 16:43:12,945 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1bdce7f7-15de-48b8-9b97-7e38a080ddd3/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-11-25 16:43:12,945 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 16:43:12,945 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 16:43:12,946 INFO L85 PathProgramCache]: Analyzing trace with hash -1679521733, now seen corresponding path program 7 times [2022-11-25 16:43:12,946 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 16:43:12,946 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1721571949] [2022-11-25 16:43:12,946 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 16:43:12,947 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 16:43:13,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 16:43:16,909 INFO L134 CoverageAnalysis]: Checked inductivity of 4839 backedges. 204 proven. 4556 refuted. 0 times theorem prover too weak. 79 trivial. 0 not checked. [2022-11-25 16:43:16,910 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 16:43:16,910 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1721571949] [2022-11-25 16:43:16,910 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1721571949] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 16:43:16,910 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1870878911] [2022-11-25 16:43:16,910 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-25 16:43:16,911 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 16:43:16,911 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1bdce7f7-15de-48b8-9b97-7e38a080ddd3/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 16:43:16,912 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1bdce7f7-15de-48b8-9b97-7e38a080ddd3/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 16:43:16,915 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1bdce7f7-15de-48b8-9b97-7e38a080ddd3/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-11-25 16:43:17,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 16:43:17,044 INFO L263 TraceCheckSpWp]: Trace formula consists of 380 conjuncts, 69 conjunts are in the unsatisfiable core [2022-11-25 16:43:17,050 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 16:43:17,383 INFO L134 CoverageAnalysis]: Checked inductivity of 4839 backedges. 204 proven. 4556 refuted. 0 times theorem prover too weak. 79 trivial. 0 not checked. [2022-11-25 16:43:17,384 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 16:43:24,859 INFO L134 CoverageAnalysis]: Checked inductivity of 4839 backedges. 204 proven. 4556 refuted. 0 times theorem prover too weak. 79 trivial. 0 not checked. [2022-11-25 16:43:24,860 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1870878911] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 16:43:24,860 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 16:43:24,860 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [70, 70, 70] total 139 [2022-11-25 16:43:24,861 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [233223861] [2022-11-25 16:43:24,861 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 16:43:24,862 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 139 states [2022-11-25 16:43:24,862 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 16:43:24,867 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 139 interpolants. [2022-11-25 16:43:24,875 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9591, Invalid=9591, Unknown=0, NotChecked=0, Total=19182 [2022-11-25 16:43:24,875 INFO L87 Difference]: Start difference. First operand 158 states and 161 transitions. Second operand has 139 states, 139 states have (on average 2.0575539568345325) internal successors, (286), 139 states have internal predecessors, (286), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 16:43:25,624 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 16:43:25,624 INFO L93 Difference]: Finished difference Result 318 states and 393 transitions. [2022-11-25 16:43:25,625 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 138 states. [2022-11-25 16:43:25,625 INFO L78 Accepts]: Start accepts. Automaton has has 139 states, 139 states have (on average 2.0575539568345325) internal successors, (286), 139 states have internal predecessors, (286), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 157 [2022-11-25 16:43:25,627 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 16:43:25,629 INFO L225 Difference]: With dead ends: 318 [2022-11-25 16:43:25,629 INFO L226 Difference]: Without dead ends: 296 [2022-11-25 16:43:25,633 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 382 GetRequests, 245 SyntacticMatches, 0 SemanticMatches, 137 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 268 ImplicationChecksByTransitivity, 9.5s TimeCoverageRelationStatistics Valid=9591, Invalid=9591, Unknown=0, NotChecked=0, Total=19182 [2022-11-25 16:43:25,634 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 0 mSDsluCounter, 24 mSDsCounter, 0 mSdLazyCounter, 300 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 33 SdHoareTripleChecker+Invalid, 301 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 300 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-25 16:43:25,635 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 33 Invalid, 301 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 300 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-25 16:43:25,636 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 296 states. [2022-11-25 16:43:25,686 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 296 to 296. [2022-11-25 16:43:25,687 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 296 states, 295 states have (on average 1.0135593220338983) internal successors, (299), 295 states have internal predecessors, (299), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 16:43:25,688 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 296 states to 296 states and 299 transitions. [2022-11-25 16:43:25,688 INFO L78 Accepts]: Start accepts. Automaton has 296 states and 299 transitions. Word has length 157 [2022-11-25 16:43:25,689 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 16:43:25,689 INFO L495 AbstractCegarLoop]: Abstraction has 296 states and 299 transitions. [2022-11-25 16:43:25,690 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 139 states, 139 states have (on average 2.0575539568345325) internal successors, (286), 139 states have internal predecessors, (286), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 16:43:25,690 INFO L276 IsEmpty]: Start isEmpty. Operand 296 states and 299 transitions. [2022-11-25 16:43:25,698 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 296 [2022-11-25 16:43:25,699 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 16:43:25,699 INFO L195 NwaCegarLoop]: trace histogram [138, 136, 12, 2, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 16:43:25,712 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1bdce7f7-15de-48b8-9b97-7e38a080ddd3/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-11-25 16:43:25,912 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1bdce7f7-15de-48b8-9b97-7e38a080ddd3/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 16:43:25,912 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 16:43:25,913 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 16:43:25,913 INFO L85 PathProgramCache]: Analyzing trace with hash -1112962452, now seen corresponding path program 8 times [2022-11-25 16:43:25,913 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 16:43:25,913 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [367974453] [2022-11-25 16:43:25,913 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 16:43:25,913 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 16:43:26,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 16:43:39,818 INFO L134 CoverageAnalysis]: Checked inductivity of 19122 backedges. 411 proven. 18632 refuted. 0 times theorem prover too weak. 79 trivial. 0 not checked. [2022-11-25 16:43:39,818 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 16:43:39,819 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [367974453] [2022-11-25 16:43:39,819 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [367974453] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 16:43:39,819 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [11493382] [2022-11-25 16:43:39,819 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-25 16:43:39,819 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 16:43:39,819 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1bdce7f7-15de-48b8-9b97-7e38a080ddd3/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 16:43:39,820 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1bdce7f7-15de-48b8-9b97-7e38a080ddd3/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 16:43:39,823 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1bdce7f7-15de-48b8-9b97-7e38a080ddd3/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-11-25 16:43:39,980 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-25 16:43:39,980 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 16:43:39,986 INFO L263 TraceCheckSpWp]: Trace formula consists of 656 conjuncts, 138 conjunts are in the unsatisfiable core [2022-11-25 16:43:39,991 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 16:43:40,662 INFO L134 CoverageAnalysis]: Checked inductivity of 19122 backedges. 411 proven. 18632 refuted. 0 times theorem prover too weak. 79 trivial. 0 not checked. [2022-11-25 16:43:40,663 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 16:44:06,551 INFO L134 CoverageAnalysis]: Checked inductivity of 19122 backedges. 411 proven. 18632 refuted. 0 times theorem prover too weak. 79 trivial. 0 not checked. [2022-11-25 16:44:06,551 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [11493382] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 16:44:06,552 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 16:44:06,552 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [139, 139, 139] total 277 [2022-11-25 16:44:06,552 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [11723464] [2022-11-25 16:44:06,552 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 16:44:06,555 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 277 states [2022-11-25 16:44:06,555 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 16:44:06,570 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 277 interpolants. [2022-11-25 16:44:06,577 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38226, Invalid=38226, Unknown=0, NotChecked=0, Total=76452 [2022-11-25 16:44:06,579 INFO L87 Difference]: Start difference. First operand 296 states and 299 transitions. Second operand has 277 states, 277 states have (on average 2.0288808664259927) internal successors, (562), 277 states have internal predecessors, (562), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 16:44:09,227 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 16:44:09,228 INFO L93 Difference]: Finished difference Result 594 states and 738 transitions. [2022-11-25 16:44:09,228 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 276 states. [2022-11-25 16:44:09,229 INFO L78 Accepts]: Start accepts. Automaton has has 277 states, 277 states have (on average 2.0288808664259927) internal successors, (562), 277 states have internal predecessors, (562), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 295 [2022-11-25 16:44:09,230 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 16:44:09,237 INFO L225 Difference]: With dead ends: 594 [2022-11-25 16:44:09,237 INFO L226 Difference]: Without dead ends: 572 [2022-11-25 16:44:09,241 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 727 GetRequests, 452 SyntacticMatches, 0 SemanticMatches, 275 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 544 ImplicationChecksByTransitivity, 34.4s TimeCoverageRelationStatistics Valid=38226, Invalid=38226, Unknown=0, NotChecked=0, Total=76452 [2022-11-25 16:44:09,242 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 0 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 582 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 41 SdHoareTripleChecker+Invalid, 583 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 582 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-11-25 16:44:09,243 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 41 Invalid, 583 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 582 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-11-25 16:44:09,244 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 572 states. [2022-11-25 16:44:09,306 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 572 to 572. [2022-11-25 16:44:09,308 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 572 states, 571 states have (on average 1.0070052539404553) internal successors, (575), 571 states have internal predecessors, (575), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 16:44:09,310 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 572 states to 572 states and 575 transitions. [2022-11-25 16:44:09,310 INFO L78 Accepts]: Start accepts. Automaton has 572 states and 575 transitions. Word has length 295 [2022-11-25 16:44:09,311 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 16:44:09,311 INFO L495 AbstractCegarLoop]: Abstraction has 572 states and 575 transitions. [2022-11-25 16:44:09,312 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 277 states, 277 states have (on average 2.0288808664259927) internal successors, (562), 277 states have internal predecessors, (562), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 16:44:09,312 INFO L276 IsEmpty]: Start isEmpty. Operand 572 states and 575 transitions. [2022-11-25 16:44:09,327 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 572 [2022-11-25 16:44:09,328 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 16:44:09,328 INFO L195 NwaCegarLoop]: trace histogram [276, 274, 12, 2, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 16:44:09,341 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1bdce7f7-15de-48b8-9b97-7e38a080ddd3/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-11-25 16:44:09,535 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1bdce7f7-15de-48b8-9b97-7e38a080ddd3/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2022-11-25 16:44:09,536 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 16:44:09,536 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 16:44:09,537 INFO L85 PathProgramCache]: Analyzing trace with hash -1556540658, now seen corresponding path program 9 times [2022-11-25 16:44:09,537 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 16:44:09,537 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [515282399] [2022-11-25 16:44:09,537 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 16:44:09,537 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 16:44:10,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 16:45:04,174 INFO L134 CoverageAnalysis]: Checked inductivity of 76254 backedges. 825 proven. 75350 refuted. 0 times theorem prover too weak. 79 trivial. 0 not checked. [2022-11-25 16:45:04,174 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 16:45:04,175 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [515282399] [2022-11-25 16:45:04,175 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [515282399] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 16:45:04,175 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [486316937] [2022-11-25 16:45:04,175 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-25 16:45:04,175 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 16:45:04,176 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1bdce7f7-15de-48b8-9b97-7e38a080ddd3/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 16:45:04,180 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1bdce7f7-15de-48b8-9b97-7e38a080ddd3/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 16:45:04,195 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1bdce7f7-15de-48b8-9b97-7e38a080ddd3/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-11-25 16:45:04,318 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2022-11-25 16:45:04,318 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 16:45:04,320 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-25 16:45:04,330 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 16:45:05,080 INFO L134 CoverageAnalysis]: Checked inductivity of 76254 backedges. 1370 proven. 4 refuted. 0 times theorem prover too weak. 74880 trivial. 0 not checked. [2022-11-25 16:45:05,081 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 16:45:05,867 INFO L134 CoverageAnalysis]: Checked inductivity of 76254 backedges. 1370 proven. 4 refuted. 0 times theorem prover too weak. 74880 trivial. 0 not checked. [2022-11-25 16:45:05,867 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [486316937] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 16:45:05,868 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 16:45:05,868 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [277, 5, 5] total 283 [2022-11-25 16:45:05,868 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [732241518] [2022-11-25 16:45:05,869 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 16:45:05,870 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 283 states [2022-11-25 16:45:05,870 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 16:45:05,880 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 283 interpolants. [2022-11-25 16:45:05,885 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39903, Invalid=39903, Unknown=0, NotChecked=0, Total=79806 [2022-11-25 16:45:05,886 INFO L87 Difference]: Start difference. First operand 572 states and 575 transitions. Second operand has 283 states, 283 states have (on average 2.0318021201413425) internal successors, (575), 283 states have internal predecessors, (575), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 16:45:08,753 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 16:45:08,753 INFO L93 Difference]: Finished difference Result 604 states and 619 transitions. [2022-11-25 16:45:08,753 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 283 states. [2022-11-25 16:45:08,754 INFO L78 Accepts]: Start accepts. Automaton has has 283 states, 283 states have (on average 2.0318021201413425) internal successors, (575), 283 states have internal predecessors, (575), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 571 [2022-11-25 16:45:08,756 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 16:45:08,760 INFO L225 Difference]: With dead ends: 604 [2022-11-25 16:45:08,760 INFO L226 Difference]: Without dead ends: 582 [2022-11-25 16:45:08,765 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1417 GetRequests, 1136 SyntacticMatches, 0 SemanticMatches, 281 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 36.2s TimeCoverageRelationStatistics Valid=39903, Invalid=39903, Unknown=0, NotChecked=0, Total=79806 [2022-11-25 16:45:08,766 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 2 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 575 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 16 SdHoareTripleChecker+Invalid, 577 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 575 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-11-25 16:45:08,766 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 16 Invalid, 577 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 575 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-11-25 16:45:08,767 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 582 states. [2022-11-25 16:45:08,824 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 582 to 582. [2022-11-25 16:45:08,825 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 582 states, 581 states have (on average 1.0137693631669535) internal successors, (589), 581 states have internal predecessors, (589), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 16:45:08,828 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 582 states to 582 states and 589 transitions. [2022-11-25 16:45:08,828 INFO L78 Accepts]: Start accepts. Automaton has 582 states and 589 transitions. Word has length 571 [2022-11-25 16:45:08,829 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 16:45:08,829 INFO L495 AbstractCegarLoop]: Abstraction has 582 states and 589 transitions. [2022-11-25 16:45:08,830 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 283 states, 283 states have (on average 2.0318021201413425) internal successors, (575), 283 states have internal predecessors, (575), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 16:45:08,830 INFO L276 IsEmpty]: Start isEmpty. Operand 582 states and 589 transitions. [2022-11-25 16:45:08,847 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 582 [2022-11-25 16:45:08,847 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 16:45:08,848 INFO L195 NwaCegarLoop]: trace histogram [281, 275, 12, 6, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 16:45:08,855 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1bdce7f7-15de-48b8-9b97-7e38a080ddd3/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-11-25 16:45:09,054 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1bdce7f7-15de-48b8-9b97-7e38a080ddd3/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 16:45:09,055 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 16:45:09,058 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 16:45:09,058 INFO L85 PathProgramCache]: Analyzing trace with hash -1493468617, now seen corresponding path program 10 times [2022-11-25 16:45:09,058 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 16:45:09,058 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1837678983] [2022-11-25 16:45:09,059 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 16:45:09,059 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 16:45:09,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 16:46:04,838 INFO L134 CoverageAnalysis]: Checked inductivity of 79039 backedges. 3036 proven. 75900 refuted. 0 times theorem prover too weak. 103 trivial. 0 not checked. [2022-11-25 16:46:04,838 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 16:46:04,839 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1837678983] [2022-11-25 16:46:04,839 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1837678983] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 16:46:04,839 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1978442111] [2022-11-25 16:46:04,840 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-25 16:46:04,840 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 16:46:04,841 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1bdce7f7-15de-48b8-9b97-7e38a080ddd3/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 16:46:04,842 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1bdce7f7-15de-48b8-9b97-7e38a080ddd3/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 16:46:04,844 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1bdce7f7-15de-48b8-9b97-7e38a080ddd3/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-11-25 16:46:05,081 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-25 16:46:05,082 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 16:46:05,090 INFO L263 TraceCheckSpWp]: Trace formula consists of 1236 conjuncts, 277 conjunts are in the unsatisfiable core [2022-11-25 16:46:05,101 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 16:46:06,006 INFO L134 CoverageAnalysis]: Checked inductivity of 79039 backedges. 3036 proven. 75900 refuted. 0 times theorem prover too weak. 103 trivial. 0 not checked. [2022-11-25 16:46:06,006 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 16:47:47,213 INFO L134 CoverageAnalysis]: Checked inductivity of 79039 backedges. 3036 proven. 75900 refuted. 0 times theorem prover too weak. 103 trivial. 0 not checked. [2022-11-25 16:47:47,213 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1978442111] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 16:47:47,213 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 16:47:47,214 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [278, 278, 278] total 555 [2022-11-25 16:47:47,214 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [709646154] [2022-11-25 16:47:47,214 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 16:47:47,217 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 555 states [2022-11-25 16:47:47,217 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 16:47:47,255 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 555 interpolants. [2022-11-25 16:47:47,276 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=153735, Invalid=153735, Unknown=0, NotChecked=0, Total=307470 [2022-11-25 16:47:47,278 INFO L87 Difference]: Start difference. First operand 582 states and 589 transitions. Second operand has 555 states, 555 states have (on average 2.0144144144144143) internal successors, (1118), 555 states have internal predecessors, (1118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 16:47:59,649 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 16:47:59,649 INFO L93 Difference]: Finished difference Result 1166 states and 1457 transitions. [2022-11-25 16:47:59,650 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 554 states. [2022-11-25 16:47:59,652 INFO L78 Accepts]: Start accepts. Automaton has has 555 states, 555 states have (on average 2.0144144144144143) internal successors, (1118), 555 states have internal predecessors, (1118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 581 [2022-11-25 16:47:59,653 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 16:47:59,658 INFO L225 Difference]: With dead ends: 1166 [2022-11-25 16:47:59,658 INFO L226 Difference]: Without dead ends: 1136 [2022-11-25 16:47:59,680 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1438 GetRequests, 885 SyntacticMatches, 0 SemanticMatches, 553 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1100 ImplicationChecksByTransitivity, 135.6s TimeCoverageRelationStatistics Valid=153735, Invalid=153735, Unknown=0, NotChecked=0, Total=307470 [2022-11-25 16:47:59,681 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 0 mSDsluCounter, 28 mSDsCounter, 0 mSdLazyCounter, 1134 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 37 SdHoareTripleChecker+Invalid, 1135 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 1134 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2022-11-25 16:47:59,682 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 37 Invalid, 1135 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 1134 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2022-11-25 16:47:59,683 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1136 states. [2022-11-25 16:47:59,798 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1136 to 1136. [2022-11-25 16:47:59,800 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1136 states, 1135 states have (on average 1.0070484581497798) internal successors, (1143), 1135 states have internal predecessors, (1143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 16:47:59,804 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1136 states to 1136 states and 1143 transitions. [2022-11-25 16:47:59,804 INFO L78 Accepts]: Start accepts. Automaton has 1136 states and 1143 transitions. Word has length 581 [2022-11-25 16:47:59,805 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 16:47:59,805 INFO L495 AbstractCegarLoop]: Abstraction has 1136 states and 1143 transitions. [2022-11-25 16:47:59,807 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 555 states, 555 states have (on average 2.0144144144144143) internal successors, (1118), 555 states have internal predecessors, (1118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 16:47:59,807 INFO L276 IsEmpty]: Start isEmpty. Operand 1136 states and 1143 transitions. [2022-11-25 16:47:59,821 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1136 [2022-11-25 16:47:59,821 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 16:47:59,821 INFO L195 NwaCegarLoop]: trace histogram [558, 552, 12, 6, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 16:47:59,829 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1bdce7f7-15de-48b8-9b97-7e38a080ddd3/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-11-25 16:48:00,022 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1bdce7f7-15de-48b8-9b97-7e38a080ddd3/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 16:48:00,022 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 16:48:00,023 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 16:48:00,023 INFO L85 PathProgramCache]: Analyzing trace with hash 1969744632, now seen corresponding path program 11 times [2022-11-25 16:48:00,023 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 16:48:00,023 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1487887869] [2022-11-25 16:48:00,024 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 16:48:00,024 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 16:48:01,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 16:52:41,607 INFO L134 CoverageAnalysis]: Checked inductivity of 311442 backedges. 6083 proven. 305256 refuted. 0 times theorem prover too weak. 103 trivial. 0 not checked. [2022-11-25 16:52:41,607 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 16:52:41,607 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1487887869] [2022-11-25 16:52:41,607 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1487887869] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 16:52:41,607 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2005719317] [2022-11-25 16:52:41,607 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-11-25 16:52:41,608 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 16:52:41,608 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1bdce7f7-15de-48b8-9b97-7e38a080ddd3/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 16:52:41,609 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1bdce7f7-15de-48b8-9b97-7e38a080ddd3/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 16:52:41,612 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1bdce7f7-15de-48b8-9b97-7e38a080ddd3/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-11-25 16:52:45,084 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 559 check-sat command(s) [2022-11-25 16:52:45,084 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 16:52:45,122 INFO L263 TraceCheckSpWp]: Trace formula consists of 2344 conjuncts, 554 conjunts are in the unsatisfiable core [2022-11-25 16:52:45,147 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 16:52:47,228 INFO L134 CoverageAnalysis]: Checked inductivity of 311442 backedges. 6083 proven. 305256 refuted. 0 times theorem prover too weak. 103 trivial. 0 not checked. [2022-11-25 16:52:47,228 INFO L328 TraceCheckSpWp]: Computing backward predicates...